//?TI?File?$Revision:?/main/2?$
//?Checkin?$Date:?April?29?2005???11:08:24?$
//###########################################################################
//
//?FILE:???DSP281x_Spi.c
//
//?title:??DSP281x?SPI?Initialization?&?Support?Functions.
//
//###########################################################################
//?$TI?Release:?DSP281x?Header?Files?V1.11?$
//?$Release?Date:?September?26?2007?$
//###########################################################################

#include?“DSP281x_Device.h“?????//?DSP281x?Headerfile?Include?File
#include?“DSP281x_Examples.h“???//?DSP281x?Examples?Include?File
#include?“dspCtrl.h“

//---------------------------------------------------------------------------
//?InitSPI:?
//---------------------------------------------------------------------------
//?This?function?initializes?the?SPI（s）?to?a?known?state.
//
void?InitSpi（void）
{
???//?Initialize?SPI-A:
???EALLOW;
???SpiaRegs.SPICCR.all=0x0007;???????//16-bit?character?No?Loopback?mode
???//SpiaRegs.SPICTL.all=0x0017;???????//Interrupt?enabled?Master/Slave?XMIT?enabled
???SpiaRegs.SPICTL.all=0x0006;???????//Interrupt?disabled
???//SpiaRegs.SPISTS.all=0x0000;
???SpiaRegs.SPIBRR?=?3;???????????//?Baud?rate??30Mhz?/（3?+?1）?=?7.5MHz
???SpiaRegs.SPIPRI.all?=?0x30;	//?free?run
???Init_Spi_GPIO（）;
???SpiaRegs.SPICCR.all=0x0087;//使SPI退出復位狀態
???SpiaRegs.SPICCR.bit.CLKPOLARITY?=?0;
???SpiaRegs.SPICTL.bit.CLK_PHASE???=?1;
???EDIS;
???//tbd...
?
}

void?Init_Spi_GPIO（void）
{
???EALLOW;
???GpioMuxRegs.GPFMUX.all?|=?0x0f;
???GpioMuxRegs.GPFMUX.bit.SPISTEA_GPIOF3?=?As_GPIO;
???GpioMuxRegs.GPFDIR.bit.GPIOF3?=?OUT_DIR;
???GpioDataRegs.GPFDAT.bit.GPIOF3?=?1;
???EDIS;
}

Uint16?EEPROM_Read（Uint16?address）
{
	Uint16?data;
	GpioDataRegs.GPFDAT.bit.GPIOF3?=?0;
	SpiWrite（READ）;
??????SpiWrite（address?&?0xff00）;
	SpiWrite（address<<8）;
	data?=?SpiWrite（0x00）;	
	GpioDataRegs.GPFDAT.bit.GPIOF3?=?1;
	return?data;
}

void?EEPROM_Write_Enable（void）
{
	GpioDataRegs.GPFDAT.bit.GPIOF3?=?0;
	SpiWrite（WREN）;
	GpioDataRegs.GPFDAT.bit.GPIOF3?=?1;
}


void?EEPROM_Write（Uint16?addressUint16?data）
{
??????Uint16?i;
	EEPROM_Write_Enable（）;
	GpioDataRegs.GPFDAT.bit.GPIOF3?=?0;
	SpiWrite（WRITE）;
	SpiWrite（address?&?0xff00）;
	SpiWrite（address<<8）;
	SpiWrite（data?<	GpioDataRegs.GPFDAT.bit.GPIOF3?=?1;?
}

Uint16?EEPROM_Read_Status（）
{
	Uint16?i1data;
	GpioDataRegs.GPFDAT.bit.GPIOF3?=?0;
	SpiWrite（RDSR）;
	data?=?SpiWrite（0x00）;
	GpioDataRegs.GPFDAT.bit.GPIOF3?=?1;
	//判斷SPI發送準備好
	return?data;
}

Uint16?SpiWrite（Uint16?data）
{
???Uint16?ret;
???SpiaRegs.SPITXBUF?=?data;
???while（Spi_RxReady（）?==?0）;
???ret?=?SpiaRegs.SPIRXBUF;
???return?ret;
}

Uint16?Spi_TxReady（void）
{
	Uint16?in;
	if（SpiaRegs.SPISTS.bit.BUFFULL_FLAG?==?1）
	{
		in?=?0;
	}
	else
	{
		in?=?1;
	}
	return（in）;
}

Uint16?Spi_RxReady（void）
{
	Uint16?im;
	if（SpiaRegs.SPISTS.bit.INT_FLAG?==?1）
	{
		im?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????3241??2008-07-23?20:32??08643012812_fm25cl64\DSP281x_Spi.c

?????文件???????6565??2008-07-23?20:12??08643012812_fm25cl64\DSP281x_Spi.h

?????文件????????142??2008-07-23?20:27??08643012812_fm25cl64\main.c

?????目錄??????????0??2013-03-25?10:25??08643012812_fm25cl64

-----------?---------??----------?-----??----

????????????????10166????????????????????5